Resilient AC Microgrids Against Correlated Attacks

Abstract

Multi-inverter AC microgrids increasingly rely on local embedded controllers and distributed communication networks to meet operational requirements, which makes the microgrids vulnerable to physical and cyber attacks. Conventional resilient control strategies generally assume that the attack signals are bounded and uncorrelated. In this paper, we study the ramifications of allowing the antagonistic inputs to be unbounded and correlated. We consider a two-layer hierarchy for networked multi-agent systems with two opposing teams on different directed communication graphs: a control protagonist team with cooperative multi-inverter microgrids and an attack antagonist team with interacting attackers. We consider three types of unbounded attack injections launched from the antagonist layer, namely, coordinated and correlated attacks on the sensor measurements, as well as generally unbounded attacks on actuator commands and communication channels. We propose a fully distributed control framework to guarantee uniform ultimate boundedness for the secondary frequency regulation and voltage containment of AC microgrids against malicious attacks. The proposed results are validated on a modified IEEE 34-bus test feeder system, which is emulated in a controller/hardware-in-the-loop environment.

Frequency control using fuzzy active disturbance rejection control and machine learning in a two‐area microgrid under cyberattacks

“…According to this figure, Z (t ) in Equation (15), which models the false data, is considered a bounded high-frequency data wave with a high amplitude. Interested readers are referred to [28] and [36] for further discussion about modelling of cyberattacks.…”

Review on microgrids design and monitoring approaches for sustainable green energy networks

“…As a result, mitigating the effects of stealth operations on frequency and voltage require both a collaborative security for vulnerabilities element and an event-driven robust control system 81 , 82 . A supplementary frequency monitoring built on a persistence measure is a method made by the researchers of 83 for islanded AC MGs. According to the findings, there is a one-to-one relationship between improving the durability score and improving the susceptibility of convergence to cyber attacks that involve inserting false data.…”